Vulcanized caoutchouc and process of making same.



UTED 8 TATE8 PATENT @FFKQE FRITZ HOFMANN AND KONRAID DELBRil'CK, OFEIJBERFELD, GERMANY, ASSIGNORS TO FARBENFABRIKEN VORM. FRIEDR. BAYER &(10., OF ELBERFELD, GERMANY, A

CORPORATION 'OE GERMANY.

VULGANIZED GAOUTCHOUC AND PROCESS OF MAKING SAME.

No Drawing.

Specification of Letters Patent. Patented Dec, 16 1913,

Application filed April 5, 1912. Serial No. 688,761.

To all whom it may concern:

Be it known that we, FRITZ HOFMANN and KoNRAD DELBRt'IoK, doctors ofphilosophy,

chemists, citizens of the German Empire, re-

methylamin, diethylamin, dimethylanilin, di-

methyl-orthotoluidin, caustic soda, etc. lVe have found that theresulting stable compounds which still contain part or all of the basiccompounds can be vulcanized, yielding excellent vulcanized products.This fact, is all the more surprising as the autopolymerization productitself produced by Kondakow is scarcely suitable for this .pur-

ose. p As described in our companion application 688,7 62, the whiteautopolymerization product can be treated with basic compounds invarious ways to give the desired stable product; for example, bymacerating the autopolymerization product with dilute anilin water, bymixing the product with dimethyl-orthotoluidin, by forming an additionalamount of beta-gamma-dimethylerythrene caoutchouc in the presence of theautopolymerization product and of dimethylanilin, etc.

In order to illustrate the new process more fully the following exampleis given, the parts being by weight :-20 parts of the product obtainableby the process of our application filed simultaneously and 2 parts ofsulfur are intimately mixed together on the mixing rolls. The mixturethus obtained is then heated for about 1 hour to 135. An, elastic sheetof good firmness and tenacity is thus obtained, containing thevulcanized autopolymerization product of beta- I gamma-dimethylbutadienecombined with the small amount of added basic substance.

' Other methods of vulcanizing caoutchouc can be used.

We claim The herein described new material being a vulcanizedautopolymerization product of beta ga ma dimethylbutadiene combined witha small amount of a basic substance,

being a whitish nonadhesive substance, containing sulfur, and which ontreatment with ozone, forms an ozonid which upon decomposition withwater yields among its de-' FRITZ HOFMANN. [L.s.] KONRAD DELBRUCK. n 3.1

Witnesses HELEN NUEER, ALBERT NUFER.

